Improve DeliveryAdminWindow

Elwig/Helpers/AppDbContext.cs

@@ -100,5 +100,13 @@ namespace Elwig.Helpers {
                 .ForEach(a => { if (a <= c + 100) c = a; });
             return c + 1;
         }
+
+        public async Task<int> NextLNr(DateOnly date) {
+            var dateStr = date.ToString("yyyy-MM-dd");
+            int c = 0;
+            (await Deliveries.Where(d => d.DateString == dateStr).Select(d => d.LNr).ToListAsync())
+                .ForEach(a => { if (a <= c + 10) c = a; });
+            return c + 1;
+        }
     }
 }

Elwig/Helpers/Config.cs

@@ -11,6 +11,7 @@ namespace Elwig.Helpers {
         private readonly string FileName;
         public string DatabaseFile = App.DataPath + "database.sqlite3";
         public string? DatabaseLog = null;
+        public string? ZwstId = null;
         public IEnumerable<string[]> Scales;
         private readonly LinkedList<string[]> ScaleList = new();
 
@@ -43,6 +44,12 @@ namespace Elwig.Helpers {
                 DatabaseLog = App.DataPath + log;
             }
 
+            if (ini == null || !ini.TryGetKey("general.branch", out string branch)) {
+                ZwstId = null;
+            } else {
+                ZwstId = branch;
+            }
+
             ScaleList.Clear();
             Scales = ScaleList;
             if (ini != null) {

Elwig/Helpers/NullItem.cs

@@ -0,0 +1,5 @@
+namespace Elwig.Helpers {
+    public class NullItem {
+        public static string Name => "- Keine Angabe -";
+    }
+}

Elwig/Helpers/Utils.cs

@@ -9,7 +9,6 @@ using System.Diagnostics;
 using System.Windows.Controls.Primitives;
 using System.Text.RegularExpressions;
 using System.IO.Ports;
-using PdfSharp.Charting;
 using System.Net.Sockets;
 
 namespace Elwig.Helpers {